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Method for producing cellulase and hemicellulase having high hydrolytic activity

Active Publication Date: 2010-06-03
NAT INST OF ADVANCED IND SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0011]According to the present invention, the cellulase productivity can be highly improved with the use of the Acremonium cellulolyticus CF-2612 strain, which is a novel microorganism belonging to the genus Acremonium and having a high ability to produce cellulase. Additionally, biomass can be efficiently degraded or saccharified by use of cellulase and / or hemicellulase produced by such a microorganism. Thus, the present invention has such significant effects.

Problems solved by technology

However, by use of such microorganisms, satisfied productivity of cellulase was not able to be achieved, which was a drawback.
In addition, the produced cellulase did not have a sufficient ability to degrade cellulose, meaning that the known cellulose enzymes cannot completely degrade cellulose into glucose.
Accordingly, there is a problem that a large amount of cellobiose and cellooligosaccharide, which are intermediates, are produced and remains during the degradation of cellulose.

Method used

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  • Method for producing cellulase and hemicellulase having high hydrolytic activity
  • Method for producing cellulase and hemicellulase having high hydrolytic activity

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[0040]The present invention will hereafter be described in more detail by the following examples, but the scope of the present invention is not limited thereto.

Acremonium cellulolyticus CF-2612 Strain (Hereafter, Referred to as the CF-2612 Strain)

(1) Method for Obtaining the CF-2612 Strain

[0041]A parent strain (Acremonium cellulolyticus C1 strain (FERM P-18508; hereafter referred to as the C1 strain)) was subjected to aerobic culture at 30° C. for 24 hours, followed by irradiation of ultraviolet rays (UV). Then, the resultant cells were incubated at 30° C. Mutant strains having a higher activity were screened from the grown colonys, followed by a second mutation of the first mutant strains, which was carried out by the same method. Then, mutant strains having a higher activity than the previous ones were screened, which were then subjected to a third mutation by NTG treatment. Thus, the mutant CF-2612 strain was obtained. The CF-2612 strain has the following morphological properties...

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Abstract

The present invention provides a novel cellulase-producing fungus, i.e. Acremonium cellulolyticus CF-2612 strain or a mutant thereof, which has an ability to produce cellulase so highly, a method for producing cellulase and / or hemicellulase by culturing said fungus, and a method for degrading or saccharifying biomass using the cellulase and / or hemicellulase.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the Acremonium cellulolyticus CF-2612 strain or a mutant thereof, which is a novel microorganism belonging to the genus Acremonium and has an ability to produce cellulase so highly.[0002]The present invention also relates to a method for producing cellulase and / or hemicellulase using the microorganism, and to a method for degrading or saccharifying biomass using the cellulase and / or hemicellulase.BACKGROUND OF THE INVENTION[0003]The “cellulase” is a collective name denoting the enzyme group that catalyzes an enzyme reaction system in which cellulose is hydrolyzed into glucose, cellobiose, or cellooligotose. Depending on the catalytic mechanism, there are enzymes referred to as FPase, CMCase, cellobiase, and the like. Cellulase degrades cellulose into glucose as an end product of degradation via interaction among such enzymes.[0004]The “hemicellulase” is a collective name denoting the enzyme group that catalyzes an enzyme r...

Claims

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Application Information

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IPC IPC(8): C12P21/06C12P19/14C12N1/14C12N1/15
CPCC12P19/14C12R1/645C12Y302/01004C12N9/2477C12N9/2437C12N9/2445C12Y302/01021C12R2001/645C12N1/145
Inventor FANG, XUYANO, SHINICHIINOUE, HIROYUKISAWAYAMA, SHIGEKIOKUDA, NAOYUKISATO, MASANORIKURODA, MASASHI
Owner NAT INST OF ADVANCED IND SCI & TECH